Scaling regimes of a semiflexible polymer in a rectangular channel.
Scaling regimes of a semiflexible polymer in a rectangular channel.
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DOI：
10.1103/physreve.91.050601
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
E. Werner;Bernhard Mehlig
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文献类型：
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作者：
E. Werner;Bernhard Mehlig
我们推导出的扩展统计和限制自由能的半柔性聚合物限制在一个通道与矩形横截面的标度关系。我们的动机是最近的数值结果[Gupta等人，140，214901（2014）]，表明与正方形通道相比，矩形通道中的拉伸波动非常不同。我们的研究结果是直接相关的解释目前的实验DNA分子局限于纳米通道，许多实验进行矩形通道具有大的纵横比，而理论和模拟结果通常是方形通道。
We derive scaling relations for the extension statistics and the confinement free energy for a semiflexible polymer confined to a channel with a rectangular cross section. Our motivation is recent numerical results [Gupta et al., J. Chem. Phys. 140, 214901 (2014)] indicating that extensional fluctuations are quite different in rectangular channels compared to square channels. Our results are of direct relevance for interpreting current experiments on DNA molecules confined to nanochannels, as many experiments are performed for rectangular channels with large aspect ratios, while theoretical and simulation results are usually obtained for square channels.